Yes. The "1" indicates the existence of the ITUNESCOMPILATION tag. And from the WIKI article I mentioned above:

QUOTE

foobar2000 links the iTunes ITUNESCOMPILATION tag to the ALBUM ARTIST tag. In case an ITUNESCOMPILATION tag is found in a file, foobar2000 treats it as if ALBUM ARTIST was set to "Various Artists". If an ALBUM ARTIST tag is found, ITUNESCOMPILATION will be ignored.